Home / 13,979.12-20,950.40-12,018.08

Finding the Fourth Proportional to 13,979.12, 20,950.40 and 12,018.08

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Solution

The fourth proportional to 13,979.12, 20,950.40 and 12,018.08 is: 18,011.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.12 : 20,950.40 = 12,018.08 : x
  2. Step 2: Convert to fraction form
    13,979.12/20,950.40 = 12,018.08/x
  3. Step 3: Cross multiply
    13,979.12x = 20,950.40 × 12,018.08
  4. Step 4: Simplify right side
    13,979.12x = 251,783,583.23
  5. Step 5: Solve for x
    x = 251,783,583.23/13,979.12
  6. Step 6: Final answer
    x = 18,011.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.